package pack1015.jicheng.问题1;

public class App {

    private static void a(){
        子类 zl = new 子类();
        zl.a = 1;
        zl.a();
        zl.c();
    }

    private static void b(){
        B b = new B();
        b.b();
        b.a();
    }

    private static void c(){
        D d = new D();
        d.b();
        d.a();
    }
    public static void main(String[] args) {
        c();
    }
}